Friday, December 29, 2006

A CNN story from AP reports that a 41-square-mile ice shelf broke free from Ellesmere Island in the course of an hour on August 13, 2005. Nobody was there to notice, but it was detected from satellite photos, and later found in seismographic records.

Warwick Vincent of Laval University, who studies Arctic conditions, traveled to the newly formed ice island and could not believe what he saw.

"This is a dramatic and disturbing event. It shows that we are losing remarkable features of the Canadian North that have been in place for many thousands of years. We are crossing climate thresholds, and these may signal the onset of accelerated change ahead," Vincent said Thursday.

In 10 years of working in the region he has never seen such a dramatic loss of sea ice, he said...

Scientists say it is the largest event of its kind in Canada in 30 years and point their fingers at climate change as a major contributing factor.

"It is consistent with climate change," Vincent said, adding that the remaining ice shelves are 90 percent smaller than when they were first discovered in 1906...

"What surprised us was how quickly it happened," Copland said. "It's pretty alarming.

"Even 10 years ago scientists assumed that when global warming changes occur that it would happen gradually so that perhaps we expected these ice shelves just to melt away quite slowly, but the big surprise is that for one they are going, but secondly that when they do go, they just go suddenly, it's all at once, in a span of an hour." ...

"Over the next few years this ice island could drift into populated shipping routes," Weir said. "There's significant oil and gas development in this region as well, so we'll have to keep monitoring its location over the next few years."